| Link | Location | |
|---|---|---|
 | Nicole, Mun Yin Ong | Singapore, Singapore |
| Regina Ong | Singapore, Singapore |
 | Sean Ong | Singapore, Singapore |
| Wei Yang Gilbert Ong | Singapore, Singapore |
| Zhe Ming Ong | Singapore, Singapore |
| Nadezhda Onishchuk | Москва, Russia |
| Toshihiro Ono | Tokyo, Giappone |
 | Ronald Oomen | Deventer, Paesi Bassi |
 | Martijn Oost | Brussels, Belgio |
| Erik Oosterhuis | Bergschenhoek, Paesi Bassi |
| Frey Oosterlinck | Harelbeke, Belgio |
| Albert Oosthuizen | Johannesburg, Sudafrica |
| Piotr Opalacz | Kraków, Polonia |
| Pavel Oparin | Almaty, Kazakistan |
| Douglas Opfer | Houston, Texas, Stati Uniti |
